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                        XPATH
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                            <b>3.1.</b>
                        
                        XPATH认识
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                        XPATH的代码例子
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                        常用的css选择器
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                        纯正则爬取智联的职位信息
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                        scrapy中的setting
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                        scrapy中的items
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                        scrapy中的middlewares
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                        框架中的代码运行脚本
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                        <h1 id="beautifulsoup4&#x7684;&#x5404;&#x79CD;&#x4F8B;&#x5B50;">BeautifulSoup4&#x7684;&#x5404;&#x79CD;&#x4F8B;&#x5B50;</h1>
<h3 id="&#x94FE;&#x5BB6;&#x7F51;&#x7684;&#x7F51;&#x9875;&#x4FE1;&#x606F;&#x722C;&#x53D6;">&#x94FE;&#x5BB6;&#x7F51;&#x7684;&#x7F51;&#x9875;&#x4FE1;&#x606F;&#x722C;&#x53D6;</h3>
<p><a href="https://bj.lianjia.com/ershoufang/c1111027378138/?sug=%E6%B5%81%E6%98%9F%E8%8A%B1%E5%9B%AD%E4%B8%89%E5%8C%BA" target="_blank">https://bj.lianjia.com/ershoufang/c1111027378138/?sug=%E6%B5%81%E6%98%9F%E8%8A%B1%E5%9B%AD%E4%B8%89%E5%8C%BA</a></p>
<pre><code class="lang-python"><span class="hljs-keyword">from</span> bs4 <span class="hljs-keyword">import</span> BeautifulSoup
<span class="hljs-keyword">import</span> requests

url = <span class="hljs-string">&apos;https://bj.lianjia.com/ershoufang/c1111027378138/?sug=%E6%B5%81%E6%98%9F%E8%8A%B1%E5%9B%AD%E4%B8%89%E5%8C%BA&apos;</span>

response = requests.get(url)

<span class="hljs-comment"># with open(&apos;lianjia.html&apos;, &apos;wb&apos;) as f:</span>
<span class="hljs-comment">#     f.write(response.content)</span>

soup = BeautifulSoup(response.text, <span class="hljs-string">&apos;lxml&apos;</span>)

li_tag_list = soup.select(<span class="hljs-string">&apos;li[class=&quot;clear LOGCLICKDATA&quot;]&apos;</span>)

<span class="hljs-keyword">for</span> li_tag <span class="hljs-keyword">in</span> li_tag_list:
    <span class="hljs-comment">#css &#x5B50;&#x9009;&#x62E9;&#x5668;&#xFF0C;&#x55A7;&#x6742;&#x989D;&#x7236;&#x5143;&#x7D20;&#x4E0B;&#x7684;&#x4E00;&#x4E2A;div&#x5E76;&#x4E14;&#x8FD9;&#x4E2A;div&#x91CC;&#x9762;&#x6709;&#x4E00;&#x4E2A;&#x7C7B;&#x662F;title&#xFF0C;&#x4E0B;&#x9762;&#x7684;&#x540C;&#x7406;&#x3002;</span>
    title_name = li_tag.select(<span class="hljs-string">&apos;div[class=&quot;info clear&quot;] &gt; div.title&apos;</span>)[<span class="hljs-number">0</span>].text
    address = li_tag.select(<span class="hljs-string">&apos;div[class=&quot;info clear&quot;] &gt; div.address&apos;</span>)[<span class="hljs-number">0</span>].text
    flood = li_tag.select(<span class="hljs-string">&apos;div[class=&quot;info clear&quot;] &gt; div.flood&apos;</span>)[<span class="hljs-number">0</span>].text
    followInfo = li_tag.select(<span class="hljs-string">&apos;div[class=&quot;info clear&quot;] &gt; div.followInfo&apos;</span>)[<span class="hljs-number">0</span>].text

    print(title_name)
    print(address)
    print(flood)
    print(followInfo)
</code></pre>
<h3 id="&#x96EA;&#x7403;&#x7F51;">&#x96EA;&#x7403;&#x7F51;</h3>
<p><a href="https://xueqiu.com/ask/square" target="_blank">https://xueqiu.com/ask/square</a></p>
<pre><code class="lang-python"><span class="hljs-keyword">from</span> bs4 <span class="hljs-keyword">import</span> BeautifulSoup
<span class="hljs-keyword">import</span> requests

headers = {
    <span class="hljs-string">&apos;User-Agent&apos;</span>: <span class="hljs-string">&apos;Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 SE 2.X MetaSr 1.0&apos;</span>,
}

url = <span class="hljs-string">&apos;https://xueqiu.com/ask/square&apos;</span>
response = requests.get(url, headers=headers)

soup = BeautifulSoup(response.text, <span class="hljs-string">&apos;lxml&apos;</span>)
div_ask_items = soup.find_all(<span class="hljs-string">&apos;div&apos;</span>, class_=<span class="hljs-string">&quot;ask-item&quot;</span>)

<span class="hljs-keyword">for</span> div_ask_item <span class="hljs-keyword">in</span> div_ask_items:
    ask_text = div_ask_item.p.text
    answer_text = div_ask_item.select(<span class="hljs-string">&apos;div.ask-item-comment &gt; div.aks-item-comment-bd &gt; p&apos;</span>)[<span class="hljs-number">0</span>].text
    print(<span class="hljs-string">&apos;&#x95EE;&#x95EE;&#x95EE;&#x95EE;: &apos;</span> + ask_text)
    print(<span class="hljs-string">&apos;&#x7B54;&#x7B54;&#x7B54;&#x7B54;: &apos;</span> + answer_text)
    print(<span class="hljs-string">&apos;-------------&apos;</span> * <span class="hljs-number">5</span>)



<span class="hljs-comment"># with open(&apos;xueqiu.html&apos;, &apos;wb&apos;) as f:</span>
<span class="hljs-comment">#     f.write(response.content)</span>
</code></pre>
<h3 id="&#x8C46;&#x74E3;&#x7684;&#x6D3B;&#x52A8;&#x9875;&#x9762;">&#x8C46;&#x74E3;&#x7684;&#x6D3B;&#x52A8;&#x9875;&#x9762;</h3>
<p><a href="https://beijing.douban.com/events/week-party" target="_blank">https://beijing.douban.com/events/week-party</a></p>
<pre><code class="lang-python"><span class="hljs-keyword">from</span> bs4 <span class="hljs-keyword">import</span> BeautifulSoup
<span class="hljs-keyword">import</span> requests

url = <span class="hljs-string">&apos;https://beijing.douban.com/events/week-party&apos;</span>
response = requests.get(url)


<span class="hljs-comment"># with open(&apos;douban_party.html&apos;, &apos;wb&apos;) as f:</span>
<span class="hljs-comment">#     f.write(response.content)</span>

soup = BeautifulSoup(response.text, <span class="hljs-string">&apos;lxml&apos;</span>)

<span class="hljs-comment"># li_tag_list = soup.find_all(&apos;li&apos;, class_=&quot;list-entry&quot;)</span>
li_tag_list = soup.select(<span class="hljs-string">&apos;ul.events-list.events-list-pic100.events-list-psmall &gt; li.list-entry&apos;</span>)

<span class="hljs-keyword">for</span> li_tag <span class="hljs-keyword">in</span> li_tag_list:
    <span class="hljs-comment">#summary = li_tag.find(&apos;span&apos;, itemprop=&quot;summary&quot;).text</span>
    summary = li_tag.select(<span class="hljs-string">&apos;span[itemprop=&quot;summary&quot;]&apos;</span>)[<span class="hljs-number">0</span>].text
    <span class="hljs-comment">#event_time = li_tag.find(&apos;li&apos;, class_=&quot;event-time&quot;).text.strip()</span>
    event_time = li_tag.select(<span class="hljs-string">&apos;li.event-time&apos;</span>)[<span class="hljs-number">0</span>].text
    fee = li_tag.find(<span class="hljs-string">&apos;li&apos;</span>, class_=<span class="hljs-string">&quot;fee&quot;</span>).text
    host_info = li_tag.select(<span class="hljs-string">&apos;ul.event-meta &gt; li:nth-of-type(4)&apos;</span>)[<span class="hljs-number">0</span>].text

    print(summary)
    print(event_time)
    print(fee)
    print(host_info)
    print(<span class="hljs-string">&apos;-----------------------------------------------------&apos;</span>)
</code></pre>
<h3 id="&#x94FE;&#x5BB6;">&#x94FE;&#x5BB6;</h3>
<pre><code class="lang-python">
<span class="hljs-keyword">from</span> bs4 <span class="hljs-keyword">import</span> BeautifulSoup
<span class="hljs-keyword">import</span> requests

url = <span class="hljs-string">&apos;https://bj.lianjia.com/zufang/c1111027378138/?sug=%E6%B5%81%E6%98%9F%E8%8A%B1%E5%9B%AD%E4%B8%89%E5%8C%BA&apos;</span>

response = requests.get(url)

<span class="hljs-comment">#&#x6240;&#x6709;&#x7684;&#x83B7;&#x53D6;&#x5177;&#x4F53;&#x5185;&#x5BB9;&#x4FE1;&#x606F;&#x7684;&#x7C7B;&#x90FD;&#x662F;&#x4E00;&#x4E2A;&#x7528;&#x6CD5;&#xFF0C;&#x8F93;&#x5165;&#x662F;html_str,&#x8F93;&#x51FA;&#x662F;&#x4E00;&#x4E2A;&#x7C7B; &#xFF0C;&#x7528;&#x4E2A;&#x8FD9;&#x4E2A;&#x7C7B;&#x83B7;&#x53D6;&#x4FE1;&#x606F;</span>

soup = BeautifulSoup(response.text,<span class="hljs-string">&apos;lxml&apos;</span>)

<span class="hljs-comment">#find-all &#x7684;&#x7528;&#x6CD5;&#x5C31;&#x662F; &#x7B2C;&#x4E00;&#x4E2A;&#x8F93;&#x5165;&#x662F;&#x6807;&#x7B7E;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x8F93;&#x5165;&#x662F;&#x5C5E;&#x6027;&#x8FC7;&#x6EE4;&#x5668;</span>

a_tag = soup.find_all(<span class="hljs-string">&apos;a&apos;</span>,target=<span class="hljs-string">&apos;_blank&apos;</span>)
print(a_tag)

ul_tag = soup.find_all(<span class="hljs-string">&apos;ul&apos;</span>, id=<span class="hljs-string">&quot;house-lst&quot;</span>)[<span class="hljs-number">0</span>]
a_tag = ul_tag.find_all(<span class="hljs-string">&apos;a&apos;</span>,target=<span class="hljs-string">&quot;_blank&quot;</span>)
print(len(ul_tag))
print(a_tag)

a_tag = soup.select(<span class="hljs-string">&apos;ul#house-lst a[target=&quot;_blank&quot;]&apos;</span>)
print(a_tag)
</code></pre>

                    
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